CN104307626B - A kind of ore-dressing technique reclaiming the extremely low Gold Ore of grade - Google Patents
A kind of ore-dressing technique reclaiming the extremely low Gold Ore of grade Download PDFInfo
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- CN104307626B CN104307626B CN201410536499.8A CN201410536499A CN104307626B CN 104307626 B CN104307626 B CN 104307626B CN 201410536499 A CN201410536499 A CN 201410536499A CN 104307626 B CN104307626 B CN 104307626B
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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Abstract
A kind of ore-dressing technique reclaiming the extremely low Gold Ore of grade, is made up of washing screen subsystem, ore deposit mud treatment system, charcoal leaching system and heap leaching system. This technique raw ore directly sieves washup, ore in sand form enters dump leaching, sludge first reclaims the bright gold of granule through stage classification, stage gravity treatment, then charcoal leaching is carried out, obtaining first paragraph gravity circuit and the Gold Concentrate under Normal Pressure of second segment gravity circuit, dump leaching gold loaded carbon and charcoal leaching gold loaded carbon, all gravity treatment Gold Concentrate under Normal Pressure and gold loaded carbon send solution of gold smelting plant process to obtain ingot. Ore-dressing technique of the present invention adopts raw ore containing gold below 0.4g/t, certain Oxidized Gold Ore containing mud more than 25%, and the recovery rate in ore-dressing of gold reaches more than 75%, takes full advantage of extremely low-grade gold ore resource, expands gold ore resource amount; In links, strengthen recycling water utilization simultaneously, return corresponding operation according to backwater character, saved water, unit Ore water consumption 0.23m3/ below t.
Description
Technical field
The present invention relates to a kind of ore-dressing technique reclaiming the extremely low Gold Ore of grade, particularly relate to a kind of can efficient recovery grade is extremely low, ore-dressing technique containing the high certain Oxidized Gold Ore of mud, belong to technical field of beneficiation.
Background technology
Gold is country's important strategic resource and strategic reserves, is also one of mankind's metal of finding the earliest and developing. The common method reclaiming gold mine mainly has the combination of flotation, gravity treatment, dump leaching, charcoal leaching and kinds of processes. A kind of the high beneficiation method reclaimed containing mud, low-grade oxide gold containing coarse gold grain can be effectively improved as patent " a kind of low-grade oxide gold beneficiation method " (CN03111966.2) discloses, the method is combined with dump leaching, gravity treatment and charcoal three kinds of techniques of leaching, by broken, washup and screening, two-stage crushing and successively twice classification, coarse granule ore deposit does not need ore grinding to be directly entered heap leaching system, and fine grained ore deposit enters charcoal leaching system; Preliminary vibration chute it is provided with, by the advance coarse gold grain of gravity treatment before grader. This beneficiation method overcomes because the height containing mud affects the drawback of heap leaching permeability, shortens dump leaching leaching cycle; Advance have followed of coarse gold grain can receive the principle early received, and makes the more single dump leaching process of recovery rate in ore-dressing be significantly increased, reaches more than 80%, take full advantage of precious resources. But the method arranges preliminary vibration chute before adopting grader, and by the advance coarse gold grain of gravity treatment, the response rate is only about 4.0%. The method is mainly used in reclaiming the Gold Ore of grade 0.8��1.0g/t, and the Gold Ore then beneficiation cost for below grade 0.4g/t is higher. How to utilize the Gold Ore of difficult choosing, and the extremely low-grade gold ore resource thrown away as barren rock because Technological Economy does not calculate becomes critically important.Therefore, it is necessary to invent a kind of can the ore-dressing technique of efficient recovery grade is extremely low, clay content is high certain Oxidized Gold Ore.
Summary of the invention
It is an object of the invention to provide a kind of can efficient recovery containing gold below 0.40g/t, ore-dressing technique containing mud more than 25%, certain Oxidized Gold Ore containing the bright gold of granule, solve that grade is extremely low, efficient recovery problem containing mud high oxidation Gold Ore.
A kind of ore-dressing technique reclaiming the extremely low Gold Ore of grade of the present invention, specifically it is made up of washing screen subsystem, ore deposit mud treatment system, charcoal leaching system and heap leaching system, raw ore directly sieves washup, ore in sand form enters dump leaching, sludge first reclaims the bright gold of granule through stage classification, stage gravity treatment, then carrying out charcoal leaching, obtain first paragraph gravity circuit and the Gold Concentrate under Normal Pressure of second segment gravity circuit, dump leaching gold loaded carbon and charcoal leaching gold loaded carbon, all gravity treatment Gold Concentrate under Normal Pressure and gold loaded carbon send solution of gold smelting plant process to obtain ingot.
Washing screen subsystem
The raw ore of largest grain size 800mm is sieved directly to bar screen (1) washup, under bar screen (1) sieve, the Ore less than 180mm enters double-deck screen shale shaker (2) washup again, under double-deck screen shale shaker (2) sieve, the Ore less than 6mm is to tremendously high frequency dusting cover (3) washup screening further, and under high frequency fine screen (3) sieve, the Ore less than 2mm enters spiral classifier (4) classification.
Ore deposit mud treatment system
The sand return of spiral classifier (4) enters first paragraph gravity circuit, namely enter and roughly select spiral concentrator (5) and roughly select, roughly select the mine tailing of spiral concentrator (5) to enter back into and scan spiral concentrator (6) and scan, roughly select spiral concentrator (5) and scan the concentrate of spiral concentrator (6) and enter that shaking table (7) is selected obtains gravity treatment Gold Concentrate under Normal Pressure; The middling recurrence shaking table (7) of shaking table (7) is selected again, and the mine tailing of shaking table (7) and the mine tailing scanning spiral concentrator (6) enter stockyard; Hydrocyclone (8) reclassification is sent in granularity spiral classifier (4) overflow less than 0.20mm, the sand setting entrance second segment gravity circuit of hydrocyclone (8) is roughly selected spiral chute (9) and is roughly selected, roughly select the mine tailing of spiral chute (9) to enter and scan spiral chute (10) and scan, roughly select spiral chute (9) and scan that concentrate entrance shaking table (11) of spiral chute (10) is selected obtains gravity treatment Gold Concentrate under Normal Pressure; The middling recurrence shaking table (11) of shaking table (11) is selected again; The mine tailing of the mine tailing and shaking table (11) of scanning spiral chute (10) returns spiral classifier (4).
Charcoal leaching system
Concentrator (12) concentration is sent in granularity hydrocyclone (8) overflow less than 0.10mm; The overflow of concentrator (12) returns washing screen subsystem and recycles; After the underflow of the concentrator (12) of mass concentration 55% enters surge tank (13), it is adjusted to the ore pulp of mass concentration 40% and enters back into carbon-in-leach tank (14) and carry out charcoal leaching, obtain gold loaded carbon and charcoal leaching mine tailing; Charcoal leaching mine tailing sends into concentrator (15) concentration backwater, the underflow of the concentrator (15) of mass concentration 55% treated up to standard after send tailings reservoir for piling; The overflow of concentrator (15) returns surge tank (13) and recycles.
Heap leaching system
On bar screen (1) sieve more than the Ore of 180mm, double-deck screen shale shaker (2) upper sieve on Ore more than 80mm with on lower screen more than 6mm less than Ore more than 2mm on the Ore of 80mm, high frequency fine screen (3) sieve, scan the mine tailing of the mine tailing of spiral concentrator (6), shaking table (7) together with deliver to dump leaching field (16) dump leaching;Pregnant solution of heap leaching enters adsorption tank (17) and adsorbs, and obtains gold loaded carbon and lean solution, and lean solution returns to dump leaching field (16) and recycles.
Described ore-dressing technique uses raw ore containing gold below 0.4g/t, certain Oxidized Gold Ore containing mud more than 25%, and the recovery rate in ore-dressing of gold reaches more than 75%, unit Ore water consumption 0.23m3/ below t.
Described roughly select spiral concentrator (5), scan spiral concentrator (6), roughly select spiral chute (9) and scan spiral chute (10) and also can use Knelson concentrator instead and carry out ore dressing.
Advantages of the present invention
The present invention provides a kind of and reclaims that grade is extremely low, ore-dressing technique containing the high certain Oxidized Gold Ore of mud, adopt raw ore directly to sieve washup, it is not necessary to broken and ore grinding, save investment, reducing production cost, the certain Oxidized Gold Ore making grade extremely low is recycled and is possibly realized; Sludge is branched away individual processing by strengthening washup, overcomes because the height containing mud affects the drawback of heap leaching permeability, has ensured gold leaching rate; Sludge strengthening classification gravity concentration after washup, according to the feature containing the bright gold of granule in Ore, takes stage classification, stage gravity treatment, the recovery of the bright gold of reinforcing particle, improves the response rate of gold; Washup sludge strengthening classification, it is ensured that enter the sludge granularity of charcoal leaching less than 0.1mm, improve the gold leaching rate of charcoal leaching, again ensure that the response rate of gold; By above-mentioned links, make raw ore reach more than 75% containing the recovery rate in ore-dressing of gold below 0.40g/t, certain Oxidized Gold Ore gold containing mud more than 25%, take full advantage of extremely low-grade gold ore resource, expand the gold ore resource amount of preciousness; Take into full account in each production link simultaneously and recycle backwater, return corresponding operation according to backwater character, namely saved water and medicament, reduced cost and protect again environment, made this technique unit Ore water consumption 0.23m3/ below t.
Accompanying drawing explanation
Fig. 1 is the mineral processing circuit figure that the present invention reclaims the extremely low Gold Ore of grade.
Number in the figure: 1, bar screen; 2, double-deck screen shale shaker; 3, high frequency fine screen; 4, spiral classifier; 5, spiral concentrator is roughly selected; 6, spiral concentrator is scanned; 7, shaking table; 8, hydrocyclone; 9, spiral chute is roughly selected; 10, spiral chute is scanned; 11, shaking table; 12, concentrator; 13, surge tank; 14, carbon-in-leach tank; 15, concentrator; 16, dump leaching field; 17, adsorption tank.
Detailed description of the invention
Embodiment 1
The present invention can the ore-dressing technique of the extremely low Gold Ore of efficient recovery grade, this technique is made up of washing screen subsystem, ore deposit mud treatment system, charcoal leaching system and heap leaching system, and specific implementation process is as follows:
Washing screen subsystem: the tcrude ore of the largest grain size 800mm from stope is without broken; sieve directly to bar screen (1) washup; under bar screen (1) sieve, the Ore less than 180mm enters double-deck screen shale shaker (2) washup again, and under double-deck screen shale shaker (2) sieve, the Ore less than 6mm is to tremendously high frequency dusting cover (3) washup screening further;
Ore deposit mud treatment system: under high frequency fine screen (3) sieve, the Ore less than 2mm enters spiral classifier (4) classification; The sand return of spiral classifier (4) enters first paragraph gravity circuit and reclaims coarse gold grain, obtains gravity treatment Gold Concentrate under Normal Pressure. First paragraph gravity circuit is namely: roughly selects spiral concentrator (5) and roughly selects; roughly select the mine tailing of spiral concentrator (5) to enter back into and scan spiral concentrator (6) and scan, roughly select spiral concentrator (5) and scan the concentrate of spiral concentrator (6) and enter shaking table (7) the selected gravity treatment Gold Concentrate under Normal Pressure that obtains and send solution of gold smelting plant to process; The middling recurrence shaking table (7) of shaking table (7) is selected again, and the mine tailing of shaking table (7) and the mine tailing scanning spiral concentrator (6) enter stockyard.Hydrocyclone (8) reclassification is sent in granularity spiral classifier (4) overflow less than 0.20mm, and the sand setting of hydrocyclone (8) enters second segment gravity circuit and reclaims the bright gold of particulate, obtains gravity treatment Gold Concentrate under Normal Pressure. Second segment gravity circuit is namely: roughly selects spiral chute (9) and roughly selects; roughly select the mine tailing of spiral chute (9) to enter and scan spiral chute (10) and scan, roughly select spiral chute (9) and scan concentrate entrance shaking table (11) the selected gravity treatment Gold Concentrate under Normal Pressure that obtains of spiral chute (10) and send solution of gold smelting plant to process; The middling recurrence shaking table (11) of shaking table (11) is selected again. The mine tailing of the mine tailing and shaking table (11) of scanning spiral chute (10) returns spiral classifier (4);
Charcoal leaching system: concentrator (12) concentration is sent in granularity hydrocyclone (8) overflow less than 0.10mm; The overflow of concentrator (12) returns washing screen subsystem and recycles; Concentrator (12) underflow of mass concentration 55% enters surge tank (13); ore pulp through being adjusted to mass concentration 40% enter back into carbon-in-leach tank (14) carry out charcoal leaching obtain gold loaded carbon and charcoal leaching mine tailing; gold loaded carbon send solution of gold smelting plant to carry gold; charcoal leaching mine tailing sends into concentrator (15) concentration backwater, concentrator (15) underflow of mass concentration about 55% treated up to standard after send tailings reservoir for piling; The overflow of concentrator (15) returns surge tank (13) and recycles.
Heap leaching system: (namely carry out dump leaching more than on the Ore of 180mm, double-deck screen shale shaker (2) upper sieve more than delivering to dump leaching field (16) more than Ore more than 2mm on the 6mm Ore less than 80mm and high frequency fine screen (3) sieve together with the mine tailing of the mine tailing and shaking table (7) of scanning spiral concentrator (6) in first paragraph gravity circuit on the Ore of 80mm, lower screen on bar screen (1) sieve on all sieves; Pregnant solution of heap leaching entrance adsorption tank (17) carries out absorption and obtains gold loaded carbon and lean solution, and gold loaded carbon send solution of gold smelting plant to carry gold, and lean solution returns to dump leaching field (16) and recycles.
Embodiment 2
The present invention's can the ore-dressing technique of the extremely low Gold Ore of efficient recovery grade, specific implementation process is as follows: except will roughly select, scan spiral concentrator (5), (6) and roughly select, scan spiral chute (9), (10) change into except roughly selecting, scanning Knelson concentrator (5), (6) and roughly select, scan Knelson concentrator (9), (10), other are all of all identical with embodiment 1.
Claims (3)
1. the ore-dressing technique reclaiming the extremely low Gold Ore of grade, it is characterized in that ore-dressing technique is made up of washing screen subsystem, ore deposit mud treatment system, charcoal leaching system and heap leaching system, raw ore directly sieves washup, ore in sand form enters dump leaching, sludge first reclaims the bright gold of granule through stage classification, stage gravity treatment, then carry out charcoal leaching, obtain first paragraph gravity circuit and the Gold Concentrate under Normal Pressure of second segment gravity circuit, dump leaching gold loaded carbon and charcoal leaching gold loaded carbon;
Washing screen subsystem
The raw ore of largest grain size 800mm is sieved directly to bar screen (1) washup, under bar screen (1) sieve, the Ore less than 180mm enters double-deck screen shale shaker (2) washup again, under double-deck screen shale shaker (2) sieve, the Ore less than 6mm is to tremendously high frequency dusting cover (3) washup screening further, and under high frequency fine screen (3) sieve, the Ore less than 2mm enters spiral classifier (4) classification;
Ore deposit mud treatment system
The sand return of spiral classifier (4) enters first paragraph gravity circuit, namely enter and roughly select spiral concentrator (5) and roughly select, roughly select the mine tailing of spiral concentrator (5) to enter back into and scan spiral concentrator (6) and scan, roughly select spiral concentrator (5) and scan the concentrate of spiral concentrator (6) and enter that shaking table (7) is selected obtains gravity treatment Gold Concentrate under Normal Pressure;The middling recurrence shaking table (7) of shaking table (7) is selected again, and the mine tailing of shaking table (7) and the mine tailing scanning spiral concentrator (6) enter stockyard; Hydrocyclone (8) reclassification is sent in granularity spiral classifier (4) overflow less than 0.20mm, the sand setting entrance second segment gravity circuit of hydrocyclone (8) is roughly selected spiral chute (9) and is roughly selected, roughly select the mine tailing of spiral chute (9) to enter and scan spiral chute (10) and scan, roughly select spiral chute (9) and scan that concentrate entrance shaking table (11) of spiral chute (10) is selected obtains gravity treatment Gold Concentrate under Normal Pressure; The middling recurrence shaking table (11) of shaking table (11) is selected again; The mine tailing of the mine tailing and shaking table (11) of scanning spiral chute (10) returns spiral classifier (4);
Charcoal leaching system
Concentrator (12) concentration is sent in granularity hydrocyclone (8) overflow less than 0.10mm; The overflow of concentrator (12) returns washing screen subsystem and recycles; After the underflow of the concentrator (12) of mass concentration 55% enters surge tank (13), it is adjusted to the ore pulp of mass concentration 40% and enters back into carbon-in-leach tank (14) and carry out charcoal leaching, obtain gold loaded carbon and charcoal leaching mine tailing; Charcoal leaching mine tailing sends into concentrator (15) concentration backwater, the underflow of the concentrator (15) of mass concentration 55% treated up to standard after send tailings reservoir for piling; The overflow of concentrator (15) returns surge tank (13) and recycles;
Heap leaching system
On bar screen (1) sieve more than the Ore of 180mm, double-deck screen shale shaker (2) upper sieve on Ore more than 80mm with on lower screen more than 6mm less than Ore more than 2mm on the Ore of 80mm, high frequency fine screen (3) sieve, scan the mine tailing of the mine tailing of spiral concentrator (6), shaking table (7) together with deliver to dump leaching field (16) dump leaching; Pregnant solution of heap leaching enters adsorption tank (17) and adsorbs, and obtains gold loaded carbon and lean solution, and lean solution returns to dump leaching field (16) and recycles.
2. a kind of ore-dressing technique reclaiming the extremely low Gold Ore of grade according to claim 1, it is characterized in that: described ore-dressing technique uses raw ore containing gold below 0.4g/t, certain Oxidized Gold Ore containing mud more than 25%, the recovery rate in ore-dressing of gold reaches more than 75%, unit Ore water consumption 0.23m3/ below t.
3. a kind of ore-dressing technique reclaiming the extremely low Gold Ore of grade according to claim 1, it is characterised in that: described roughly select spiral concentrator (5), scan spiral concentrator (6), roughly select spiral chute (9) and scan spiral chute (10) and also can use Knelson concentrator instead and carry out ore dressing.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106191458A (en) * | 2016-07-08 | 2016-12-07 | 中信重工机械股份有限公司 | A kind of process reclaiming coarse gold in grinding circuit in advance |
| CN107115959A (en) * | 2017-05-10 | 2017-09-01 | 吉林吉恩镍业股分有限公司 | The method that packed in gangue micro-fine-grained gold in mine tailing is reclaimed with Nelson's gravitational separation equipment |
| CN107876206B (en) * | 2017-11-23 | 2019-08-16 | 山东九曲圣基新型建材有限公司 | A method of full utilization gold tailings |
| CN110292990B (en) * | 2019-07-11 | 2021-07-27 | 河南省岩石矿物测试中心 | Method for improving gold recovery rate and beneficiation efficiency |
| CN111589574B (en) * | 2020-07-02 | 2021-09-17 | 长沙有色冶金设计研究院有限公司 | Method for recovering copper and gold from copper-containing tailings |
| CN112844859B (en) * | 2021-01-29 | 2022-11-15 | 刘学军 | Beneficiation process for high-carbon high-oxidation micro-fine-particle gold ore |
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Address after: 330031 No. 888, Qian Hu Road, Hongjiao Island, Nanchang, Jiangxi. Patentee after: China ruim engineering technology Limited by Share Ltd Address before: 330063 No. 888, Qian Hu Road, Hongjiao Island, Nanchang, Jiangxi. Patentee before: China Nerin Engineering Co., Ltd. |